Boring apparatus



J. W. FRENCH BORING APPARATUS April 13, 1937.

Filed Oct. 22, 1954 //\/1/E/\/ TEFL Z3- QEAM w 3% Patented Apr. 13, 1937 UNITED STATES PATENT OFFICE.

United Shoe Machine ry Corporation, Paterson,

N. J., a corporation of New Jersey Application October 22, 1934, Serial No. 749,353

16 Claims.

This invention relates to apparatus for boring holes in work. A field in which it has special utility is in the drilling of shoe-heels f-br the insertion of screw-fastenings.

In the attaching of wood heels to shoes, a common practice is to apply an adhesive to the heel-seat of the shoe and the corresponding end of the heel, and secure these, while the adhesive is setting, by a screw which may be either temporary or permanent. In preparation for the insertion of the screw, a hole is drilled through the heel-seat of a lasted shoe into a heel clamped thereon, the drill passing through a guide-channel extending from the top of the last-cone to 115 the heel-seat surface. The drilled hole in the heel should be somewhat deeper than is necessary to receive the screw, since the resistance offered to insertion when the point of the screw strikes the bottom of the hole may split the heel, strip the thread which the screw has cut in the wood, or cause the screw to be twisted off. On the other hand, if the hole is too deep the point of the drill may emerge through the tread-surface or peripheral wall of the heel. It

is therefore important that the extent to which the drill enters shall be kept within rather narrow limits. This is diflicult, because the work comes to the operator upon lasts having cones of different heights, and the surface of the cone can not be employed to determine when the drill begins its out upon the heel-seat material hidden by the last or ends its progress into the heel. It is an object of my invention to provide for boring to a predetermined depth, however the surface entered may be concealed from the operator. To gain this end, I associate with a drill, or other unitary tool, means controlled by the engagement with the work of the entering portion of the tool for predetermining the passage of said tool into the work, or the extent of its effective operation, this being capable of variation. Therefore, regardless of the form or dimensions of the last or other object, by which portions of the work may be hidden, a definite entrance of the tool into said work is assured to the depth desired. As herein disclosed, a movable gage is provided, and this gage may be connected for movement with the spindle through which the tool is rotated by a clutch device, as by a detent engaging teeth upon the gage, this device being operable by a handle movable upon the spindle. When the advance of the tool has momentarily stopped by contact of its point with the work, continued movement of the handle which is being manipulated by the operator causes the clutch device to couple the gage to the spindle, and the action of the tool upon the work continues to an extent determined by the setting of the gage.

The accompanying drawing illustrates one of many forms which my invention may assume,

Fig. 1 being a side elevation of my improved boring apparatus;

Figs. 2 and 3, respectively, enlarged broken side elevations of the upper and lower portions of the apparatus; and

Fig. 4, a horizontal section on the line IVIV of Fig. 3.

The features peculiar to my invention may be included in such an apparatus as that disclosed in Letters Patent of the United States No. 1,722,992, Bertrand, August 6, 1929. Upon .a table I0 is carried a tread-plate l2 for a shoe S containing a last L and for a heel H, there being a back-stop I4 for the heel and a member l6 for clamping the shoe and heel together. At I 8 appears a fragment of a frame-arm in which rotates a horizontal driving shaft 22. Gearing 24 transmits the rotation of the shaft 22 to the upper section 26 of a drill-spindle D, this section turning in a bearing 28 supported for universal movement upon the frame-arm I 8. Connected to the spindle-section 26 is an extensible section 30 and to this is united a terminal section 32 by a universal joint 34. The section 32 has formed upon or secured to it a chuck 36 for a drill 38. A handle 40, in which the spindle-section 32 rotates freely, may be grasped and pressed down by the operator tocause the drill tocut.

As thus far described, the depth to which the J drill may act, as a result of the movement of the spindle-sections 30 and 32 on the section 26, is dependent upon the necessarily inaccurate judgment of the operator, and this is made more uncertain by the changes in lasts, such as have already been mentioned. My invention furnishes automatically acting .depth-termining means in the following manner: From the bearing 28 and movable laterally with it a bracket-arm,

depends. This has a vertical cylindrical extension 44 through which passes a gage-rod 46 splined to move longitudinally without rotation. The rod is held up in a normal position upon the supporting arm 42 by a spring 48 surrounding the extension and gage-rod, and abutting against the bracket 42 and against a nut and check-nut 50 threaded upon the upper extremity of the rod. The extent of upward movement of the rod under the influence of the spring is limited by a collar 52 which contacts with the under face of the bracket;

downward movementof the link causes engage-V.

for engagement with a series of teeth 62 formed in the adjacent side of outer wall of the carrier link 64 furnishing at its the gage-rod. To the is secured a suspension lower end a fulcrum for a lever 66. The inner end of the lever has upon it a yoke 68, the arms of which ternuna'te'a t opposite sides of the center of the universal joint 34. Here, these arms are pivotally connected at B9 to arms '10, 10 which handle 40. lever to the detent 60, therelation being such that ment of the detentwith the teeth The handle is arranged to yield upon the spindle section 32 against a helical-spring 14. This spring surrounds the spindle, contacting at its upper extremity with a sh'ouder 15 at the end of arecess iin which it is contained in the handleand at the bottom with an anti-friction tween it and the chuck 36. The expansive force of the spring urges the top of which rests against a collar 82 fast upon thespindle-section 32'. r

In using my improved apparatus, a lasted-shoe S and its heel H are clamped as usual upon the supporting plate 12; The nuts'50 are so set upon the gage-rod 46 that thedistance between the bottom of the lower nut I and the top of the bracket extension 44 equal to the distance which the drill '38 is to penetrate the work. Grasping the handle 40 and with the spindlel) in rotation, the operator introduces the drill into the guide-channel of the last L and lowers it, the telescopic connection between the sections 30 and permitting thisf The spring I4 holds thehandle inits normally raised position upon the section 32 until-the point of the drill "encounters the heel-seat of the shoe, which resists-penetratio'n.- Then the-handle yields,'and,as it' moves down, swings the lever 66 in an anti-clockwise direction, as viewed in: the "drawing. This, throught-he link'*1 2, brings the detent 60 into engagement with the teeth ofthe'gagerod 46.

There is "thus furnished a clutch device which jceuples the rod and member 54,"compelling them to move together. Now, said. member'can be moved down only until thenuts 50 strike the bracket-extension 44. Since the member 541s heldagainst movement longitudinally of the spinidle-section -30,=theentrance of the diillinto-the work is correspondingly-hunted; is entirely independent of the character of the last, the drill being of sufficient length tobore the desired depth of hole -inthe=hee'l for all heights oflast-cones. The -succeeding operations continue without attention on the part of the operator to the depth of drilling, unless a difierent length of screw is to be inserted. Then-the operator has only to correspondingly vary the position of the nuts 50. Because the pivotal connection of the handle at .69 is at or near thecenter of the universal joint '34, the lever 66 is unaffected by the lat'e'ralswin'g- 'ing ,of the spindle-section as it enters the zguide-holes of. [different lasts :at varying angles.

rise from the top of the Between its ends, a link 12 joins the bearing 18 interposed be-' 7 upper portion of the 'h'a ndle against an anti-friction bearing 80, the 7 The detent 60 is consequently not carried into clutching engagement with the teeth 62 until downward movement of the handle upon its spindle-section begins.

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is: a

1. In a boring apparatus, a boring tool, gaging means arranged to predetermine the depth to which the tool may enter the work, and means controlled by resistance of the tool topenetration of the work for rendering the gaging means effective. V

2. In a boring apparatus, a movable drillspindle, a gage member for the spindle, and means for coupling the spindle under the control of the work. 7

3. In a boring apparatus, a movable drillspindle, a movable gage member, means arranged to vary theextent of movement of the member, and means made effective upon change of movement of the spindle for coupling the member to said spindle for movement therewith.

4. In a boring apparatus, a spindle, :a handle movableu'pon the spindle, a gage member for the spindle, and means controlled by movement of the handle for coupling the gage member to the spindle.

5. In a boring apparatus, a. rotatable spindle, a drill-holder carried by the spindle, a. member yieldable upon the spindle toward the holder, a depth-gage movable longitudln'ally'of the spindle, and means controlled by the member during its yield for coupling the gage to the spindle.

6. In a boring apparatus, a movable drillspindle, a handle yieldable thereon, a gage movable adjacent to the spindle and at all times tree from contact with the work, a clutch device for connecting the gage to'the spindle, and connections to the handle for actuating the clutch device. V

'7. In a boring apparatus, a movable drill! spindle, a handle yieldable thereon, a gage movable adjacent to the spindle and provided with a series of teeth, a detent movable upon the spindle for engagement with the teeth-and a link 7 connecting the handle to the detent.

8. In a boring apparatus, a drill-s'pindle rotatable and laterally movable during the application of the drill to the work,a bearing-for the spindle,

a membermounted upon the bearing'to move a predetermined distance,

along the spindle to v and a coupling device i'or connecting the member to the spindle,

9. In a, boring apparatus, a rotatable and laterally movable drill-spindle, a bracket arranged to move laterally with thespindle, a member mountgage member to the movable drilled tomove through the bracket longitudinally of the spindle, means arranged to vary the extent of movement of the member, and acoupling de-' vice for connecting the member to the spindle.

7 -10. Ina boring apparatus, a rotatable drillspindle,

spindle, a -fulcrum member supported upon the spindle, a lever fulcr umed upon the member and connected to the handle, a gagememb'er movable longitudinally of the spindle-a clutch device for a handle movable longitudinally of the joining the gage member to the spindleand connections to the lever for actuating the clutch device.

-11. In a'boring apparatusfa rotatable dr i'llspindle, V :spindle, a ,fulcrum member supported upon the a handle movable longitudinally of the spindle, a, fulcrum member being held by the gage meniber against-rotation with the spindle,

a lever fulcrumed upon the member and connected to the handle, a gage member movable longitudinally of the spindle, a clutch device for joining the gage member to the spindle, and connections to the lever for actuating the clutch device.

12. In a boring apparatus, a rotatable drillspindle formed in sections, a universal joint connecting the sections, a handle movable upon the spindle, a gage member movable longitudinally of the spindle, a device for clutching the gage member to the spindle, a lever through which the clutch device may be actuated, and pivotal connections between the handle and the lever, the pivotal axis lying at substantially the center of the universal joint.

13. In a boring apparatus, a rotatable drillspindle, a handle movable longitudinally of the spindle, a spring holding the handle normally raised upon the spindle, a toothed gage-rod movable longitudinally of the spindle, a member carried by the spindle, a detent pivoted upon the member, and a link communicating to the detent movement of the handle against the force of the p ng.

14. In a boring apparatus, a'rotatable drillspindle, a handle movable longitudinally of the spindle, a spring holding the handle normally raised upon the spindle, a toothed gage-rod movable longitudinally of the spindle, a member held against movement upon the spindle longitudinally thereof and retained against turning by the gagerod, a detent pivoted upon the member, and a link communicating to the detent movement of the handle against the force of the spring.

15. In a. boring apparatus, a rotatable drillspindle, a support associated therewith, a gage member movable upon the support, a spring interposed between the support and the gage member for holding said member in its normal position, connections to the spindle for moving the gage member, and variable means for limiting the extent of movement of the gage member against the force of the spring.

16. In a boring apparatus, a rotatable drillspindle, a support associated therewith and having an upward extension, a gage member movable upon the support and having a threaded portion lying above the extension, a nut variable in position upon the threaded portion of the gage member and movable into contact with the extension, a spring interposed between the support and nut and surrounding the extension, and connections to the spindle for moving the gage member.

JOHN W. FRENCH. 

